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Debt (Schedule of Debt) (Details) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Jun. 30, 2014
Debt Instrument [Line Items] |  |  |
Revolving credit facility | $ 96,000 | $ 121,000 |
Debt: |  |  |
Long-term debt | 98,516 |  |
Total debt | 2,516 | 8,044 |
Less: current portion | (1,533) | (4,192) |
Total long-term debt, net | 983 | 3,852 |
Revolving Credit Facility [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Revolving credit facility | $ 96,000 | 121,000 |
Debt: |  |  |
Debt, maturity | September 2021 |  |
Maximum [Member] | Line of Credit [Member] |  |  |
Debt: |  |  |
Interest rate | 3.58% |  |
Minimum [Member] | Line of Credit [Member] |  |  |
Debt: |  |  |
Interest rate | 3.40% |  |
Senior Notes [Member] |  |  |
Debt: |  |  |
Debt interest rate |  |  | 9.50%
PST Short-Term Obligations [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Short-term debt | $ 989 |  |
Debt: |  |  |
Debt, maturity | 2019 |  |
PST Short-Term Obligations [Member] | Maximum [Member] |  |  |
Debt: |  |  |
Interest rate | 11.27% |  |
PST Short-Term Obligations [Member] | Minimum [Member] |  |  |
Debt: |  |  |
Interest rate | 10.00% |  |
PST Long-Term Notes [Member] |  |  |
Debt: |  |  |
Long-term debt | $ 1,527 | 8,016 |
Debt, maturity | November 2021 |  |
Interest rate | 8.00% |  |
Other [Member] |  |  |
Debt: |  |  |
Total debt |  | $ 28 |

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- Definition Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13,16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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